Update README.md. [ci skip]

- Note for Travis build.
- More emoji deletions : (

Author: JuanitoFatas

README.md

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 Fast Ruby [![Build Status](https://travis-ci.org/JuanitoFatas/fast-ruby.svg?branch=travis)](https://travis-ci.org/JuanitoFatas/fast-ruby)
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-In [Erik Michaels-Ober](https://github.com/sferik)'s great talk, 'Writing Fast Ruby': [Video @ Baruco 2014](https://www.youtube.com/watch?v=fGFM_UrSp70), [Slide](https://speakerdeck.com/sferik/writing-fast-ruby), he presented us with many idioms that lead to faster running Ruby code. He inspired me to document these to let more people know. I try to link to real commits so people can see that this can really have benefits in the real world. **This does not mean you can always blindly replace one with another.  It depends on the context (e.g. `gsub` versus `tr`). :warning: Use with caution!**
+In [Erik Michaels-Ober](https://github.com/sferik)'s great talk, 'Writing Fast Ruby': [Video @ Baruco 2014](https://www.youtube.com/watch?v=fGFM_UrSp70), [Slide](https://speakerdeck.com/sferik/writing-fast-ruby), he presented us with many idioms that lead to faster running Ruby code. He inspired me to document these to let more people know. I try to link to real commits so people can see that this can really have benefits in the real world. **This does not mean you can always blindly replace one with another. It depends on the context (e.g. `gsub` versus `tr`). Friendly reminder: Use with caution!**
 
 Each idiom has a corresponding code example that resides in [code](code).
 
-All results listed in README.md are :running: with Ruby 2.2.0p0 on OS X 10.10.1. Machine information: MacBook Pro (Retina, 15-inch, Mid 2014), 2.5 GHz Intel Core i7, 16 GB 1600 MHz DDR3. Your results may vary, but you get the idea. : )
+All results listed in README.md are running with Ruby 2.2.0p0 on OS X 10.10.1. Machine information: MacBook Pro (Retina, 15-inch, Mid 2014), 2.5 GHz Intel Core i7, 16 GB 1600 MHz DDR3. Your results may vary, but you get the idea. : )
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+You can checkout [the travis build](https://travis-ci.org/JuanitoFatas/fast-ruby) for these benchmark results ran against different Ruby implementations.
 
 **Let's write faster code, together! <3**